I have a project in which I have 3 four-measure (at 96 bpm) loops that I want to load into ENSO or RE-1. When I load the second or third instance, the CPU meter goes from about 19% to over 100% and all audio playback stops working until I get rid of the AU.

This is on an iPad 6th Generation running iOS 12.1.4. I was having the problem with iOS 11.4.1, also.